repair costs for my sansamp?

Hello there, its been a while since I've ventured to talkbass, due to computer troubles. But its good to be back.
In the past couple months, my Sansamp Bass DI has been giving me NOTHING but feedback (pure pure buzz, no signal from my bass at all). The buzzing only ceases when I engage the 'Ground Control' feature. I have no idea why this stops the buzzing, but it does. However, when this feature is engaged, it takes alot of volume out of my bass signal, so playing along with my band is out of the question. Since its began doing this, I have not had the cash, nor the drive to bring it in and get it fixed. And sadly, I've been running straight into my head. Its one of the older models, and i bought it used, so warranty is not something i can fall back on.
I was just wondering if anyone has had this same problem, and if so, what kind of costs am I looking at to fix it.
Replacing this would be a pain in my wallet, and i dont think i have 250 to blow on another one, but at the same time, this little box works absolute magic for my sound. I'm in a bit of a pickle, and with some big shows lined up, I think its time I start really making my bass sound how i want it.

Hey, I got through to someone at Tech 21, and just incase anyones interested (or this happens to anyone in the future..) I decided I'd post his email.

Dear Rory,
Thanks for your inquiry, but I'll need some more information...

Are you using the Bass DI between your bass and your amp? And are you using a proper Lo-Z to Hi-Z transformer (such as the Shure A95 or Radio Shack 274-016), or just a cable with an XLR on one end and a 1/4" on the other?

It sounds like you have some sort of ground problem, but what's causing it (based on what you've told me) appears to have something to do with how you're hooking things up. What else is in the chain?

See, the Bass DI isn't designed with the intention of sending the SansAmp signal to an amp, although there are ways to do that. So if you're not using it to feed the PA
(its primary purpose), you'll have to list everything you're doing so we can offer some advice.

Regards,
Lloyd Schwartz, Product Manager

Click to expand...

I'm really hoping its a connection problem, since it would be alot easier to fix (and alot easier on the wallet).